Nonslip tread



J. W. SCOTT June 26, 1 928.

NONSLIP TREAD Filed Aug. 19, 1927 l NVENTOR claim M Scott BY a" j AW extreme e Patented June 26, 1928.

UNITED STATES PATENT OFF 1,675,198 ICE.

JOHN W. SCOTT, 01 NEW YORK, N. Y., ASSIG'NOB '10 STANDARD SAFETY TREAD COR- POBATION, 01 NEW YORK, N. Y.,

A CORPORATION OF NEW YORK.

NONSLIP TREAD. I

AppHcatlon flled August 1'9, r927. seriai'm. 214,020.

This invention is an improvement in treads for stairways and the like, and more particularly in a nonslip tread.

In treads as heretofore constructed, means in the form of a. molded metal reinforcement is rovided for the edge of the stair tread, an for a part of the top thereof ad]acent to the edge. Y Y

The usual flOOI'tOVGIiIlg is placed on that portion of the reinforcement onthe upper face of the tread, a rib, undercut or otherwise, bein (I e of the tread against-which the usual floor fovering, such as cork or linoleum is abutted.

Thus the floor-covering lies upon the reinforcement, and in use, the covering becomes broken or creased at the edge of the reinforcement, so that there is a visible marri'ng of the covering along this line. 1 This is true even when the reinforcement is gradually thinned to a feather edge, as

there is always more or less displacement of the floor covering upward by the reinforcement. -I e a,

Any metal left'exposed to wear by persons using the'stair quickly becomes smooth and invention is t the abrasiveilto connect the slippery, so that an insufiicient hold is ofiered for the foot, and there is a liability to falls from slipping on the, reinforcement with consequent in ury.

One of, the rimary objects of the present e provision of a construction of tread wherein a minimum of metal is exposedto wear, while at the samehtime the edge 'o'f'the stair tread is sufliciently reinforced, and wherein the reinforcement and usual floor cove1ing,, abut squarely, instead of lapping one upon the other.

A further object is the provision of a tread carrying an exposed'l ayer of an abrasive substance, having a high coefficient of friction, such for, instance as powdered carborundum.

A further object is the rovision of mechanism in connection with t e tread for firml anchoring the abrasive material to the trea against the ossibility of displacement by chi ping and the like. 5, J

I further object is to provide mechanism in connection with the anchorin means for trea to the stair while firmly held, when desired for tread, in sue manner that it is capable of removal any purpose.

size and minor details usually provided at or near the havingan undercut channel 4 With these and other objects in view the invention consists in the construction and novel combination of parts fully described ereinafter, illustrated in the accompanying drawings, and pointed out in the claims appendedhereto, it being understood that various changes in the form, proportion,

of construction within the scope of the claims, may be resorted to without departing from the spirit of the invention.

. In the drawings forming a part hereof Fig. 1 is a perspective view' of a part of a stair provided with the improved tread.

Fig. 2 is a transverse section showing one of the anchoring means.

In thepresent embodiment of the invention, the improved tread is shown in connection with-the tread 1 of a stair, usually of wood or like material, having the free edge thereof which extends beyond the riser rounded as shown.

The tread comprises a body portion 3 in its upper face, extending the full lengtl'i of the tread, and substantially the full width thereof. The tread is also provided with a depend ing flange 5, fitting the rounded edge 2 of the stair treadand covering the same.

The front wall 6 of the channel is a continuation of the flange 5 as shown, and the rear wall 7 has its outer face perpendicular to the stair tread when the tread is in place, so that the usual fioor covering indicated at 8, such as linoleum or the like, may be abutted squarely against the said wall, thus to provide a close joint between the floor covering and the reinforcing tread.

The channel 4 is filled with an abrasive 9, such as powdered carborunduin or the like, molded into shape in the channel, and held in part by the undercut faces of the front and rear walls 6 and 7 of the channel. In addition the body of the tread is provided at suitable intervals with openings 10, which as shown are reamed or undercut, flaring from the channel. The said openings are designed .to receive locking projections on the abrasive, thus to abrasive in the channel.

The tread is adapted to be connected to the stair tread, by means of screws 11, or the like, which are passed through openings in the body of the tread. In each of these openings is arranged a sleeve or funmore firmly anchor the,

nel shaped eyelet 12; That is each eyelet consists of a substantially cylindrical portion passing through the opening, and upset on the underside of the tread body, and a fiarin or funnel shaped portion which extends a ove the upper, face of the body, and has the free end thereof substantially flush with the tops of the walls 6 and 7.

The eyelets are intermediate the side walls, and maybe spaced at suitable intervals. The screws are passed through the eyelets, the funnel shaped or flaring upper end being shaped to fit the head of the screw as shown. Thus in addition toproviding a housing for the screw, the eyelets serve to anchor the nonslip filling. The filling also acts to hold the eyelets in place.

The improved tread provides a neat finish for the upper face of the stair tread, with a minimum exposure of metal, and with a strip of material, resistant to wear, and with a high coeflicient of friction. This strip is at the edge of the stair tread, in the position most subject to wear. It is firmly anchored to the reinforcing tread, and the entire device may be easily removed when desired for any purpose.

What is claimed as new is 1. A nonslip tread of metal including a body adapted to lie on the up e'r face of the stair tread, and a depending flange shaped to fit the edge of the tread, the upper face of the body having a channel extending the full length and substantially the full width thereof, for receiving abrasive material with a hi h coefficient of friction, and means for anc oring the abrasive in the channel, including undercut side walls, the body having openings extending through the same in the bottom of the channel for receiving the abrasive material.

2. A nonslip tread of metal including a body adapted to lie on the upper face of the stair tread, and a depending flange sha ed to fit the edge of the tread, the up er' ace of the body havin a channel exten ing the full length and su stantially the full width thereof, for receiving abrasive material with a high coeflicient of friction, and means for anchoring the abrasive in the channel, including undercut side walls, and undercut openings in the body, said openings extending through the body in the bottom of the channeL- 3. A nonslip tread of metal including a body adapted to lie on the upper face of the stair tread, and a depending flange shaped to fit the edge of the tread, the upper face of the body having a channel extendin" the full length and substantially the full widththereof, for receiving abrasive material with a hi h coefficient of friction, and means for anc oring the abrasive in the channel, including undercut side walls, and openings having eyelets held therein, the upper ends of the eyelets flaring, said eyelets adapted to receive a securing means for connecting the tread to a stair tread.

4. An attachment for stair treads having a body adapted to lie on the upper face of 7 the stair tread, and a flange to fit the front edge thereof, the body having a channel extending longitudinally thereof, and provided with substantially funnel shaped eyelets at suitable intervals in the channel to enable 7 the passage of securing means for the tread, and a filling of nonslip material in the channel and about the eyelets.

5. An attachment for stair treads havin a body adapted to lie on the upper face 0 the stair tread, and a flange to fit the front edge thereof the body having a channel extending longitudinally thereof, and provided with substantially funnel shaped eyeletsat suitable intervals in the channel to enable, the passage of securing means for the tread, the channel ada ted to receive a filling of nonslip materia to be anchored by the eyelets.

6. An attachment for stair treads having a body adapted to lie on the up er face of I the stair tread at the front edge t ereof, and a flange to fit said edge, the body having an undercut channel extending the full length thereof and substantially the full width, and provided with openings in the bottom of the channel extending through the body, sundry of the openings flaring toward the bottom of the body and funnel-shaped eyelets in the other openings for the purpose specified. Signed at New York in the county of New York and State of New York this 15th day of August A. D. 1927.

JOHN W. SCOTT. 

